Radiator maintenance how to change a radiator

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Radiator Maintenance: How to Change a Radiator

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There are several different reasons why you might want to change your radiator. For example, you might be redecorating and thing that a new design of radiator will work better in the space; or, your existing radiator may be faulty. Regardless of the reason, it makes sense to undertake this work yourself. Plumbers charge between £100 and £200 per hour for labour costs, so it makes much more sense to do it yourself if you can.




People are often reluctant to do any work on their radiators themselves because of the risks if things go wrong. Floods are commonplace and they damage is very expensive to fix – it runs into the thousands. However, as long as you’re careful and you understand what you’re doing, there’s no reason why you can’t change the radiators yourself.







Step 1: turn off the water supply. You don’t have to turn it off completely; you can simply turn off the supply to that particular radiator. However, it’s definitely better to be safe than sorry, so we will always recommend that you turn off the entire water supply.

Step 2: close the valve on the right hand side of the unit. For the valve on

the right hand side of the radiator as you’re facing the wall, remove the valve head (e.g. the TRV head unit) and make sure that you close the actual valve to the off position.

Step 3: close the lock shield valve. This is the valve to the left of the unit as

you’re facing it. Make sure that it is set to the off position. Step 4: to be extra safe, use a wrench to close both valves as tightly as you

can (don’t force too hard or you might break the thread, but do make sure that it’s tighter than you’d be able to do by hand).




Step 5: Drain the radiator. Take a cup or jug (something that fits underneath the valve on the right hand side of the radiator) and hold it under the valve. Open the nut that you find to the left of the valve on the right of the radiator (if confused, look this up online so that you know exactly which bit to turn. It’s the same for traditional radiators and modern radiators). Release this nut slowly until water starts to accumulate in the cup. Shut it off as the cup fills up. Empty the cup down the sink/toilet. Then go back to the radiator and repeat this step. Keep repeating this step until no more water comes out of the radiator. You know when the water is all out because you can literally turn the nut so much that it’s no longer attached to the pipe that comes out of the floor. In other words, you can disconnect the radiator from the pipe on the right hand side.




Step 6: step 5 has created a vacuum in the radiator, there is still water trapped inside, you just can’t release it properly. You need to let air into the top of the radiator. With traditional radiators, there is a nut at the top right hand side of the unit. You open this and collect the water from the same bit that you collected if from before – it comes out of the same place. Be careful to release it slowly, or it can come gushing out. If it does come out too fast, you can stop it with your finger or something that’s big enough to block the hole. Make sure that you have this thing in place before you release the nut.


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Step 7: Once you’ve emptied as much water as you can, you need to crack the nut at the other side of the radiator, on the left hand side. Block both sides of the radiator with each thumb and pick the unit up, or if it’s too large, have someone else block the other side. Then you can take the radiator off the wall and empty the contents down the sink.

Are you interested in buying radiators, including both modern

and traditional radiators, then please visit designerradiatorsdirect





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Radiator maintenance how to change a radiator